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E170ColorantLow concern
Calcium Carbonate
In plain words
The short version
A white mineral pigment used as a colorant, anticaking agent, and calcium fortifier.
Why it's green
It's widely considered safe at the amounts used in food, so we mark it green. The Safety section below has the details.
Safety profile
No ADI required. Essential nutrient. Excessive intake (above 2 g/day calcium total) can cause constipation, kidney stones, or milk-alkali syndrome.
The detail
Educational information only. Not medical or dietary advice.